The effect of temperature on motility of the nauplius and cypris stages of the acorn barnacle Semibalanus balanoides
Bibliographic record
Abstract
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 579:55-66 (2017) - DOI: https://doi.org/10.3354/meps12246 The effect of temperature on motility of the nauplius and cypris stages of the acorn barnacle Semibalanus balanoides Kevin A. Sorochan*, Anna Metaxas Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada *Corresponding author: kevin.sorochan@dal.ca ABSTRACT: Variability in motility of planktonic larval marine benthic invertebrates with environmental conditions can affect the dispersal and survival of individuals by its influence on encounters with food and predators, horizontal transport, and settlement. We quantified the swimming speed and directional persistence, expressed as a persistence time and persistence length (i.e. run duration, and run length of a random walker), of nauplii and cyprids of the acorn barnacle Semibalanus balanoides over a temperature range of 0 to 12°C. We fit persistence time and length parameters in a correlated random walk model to displacement data obtained from video-recordings in 2D (horizontal and vertical dimensions). Nauplii (stages 2 and 6) were generally characterized by lower swimming speeds (nauplii: 0.98 to 2.54 mm s-1; cyprids: 2.56 to 3.19 mm s-1), higher persistence times (nauplii: 1.18 to 5.49 s; cyprids: 0.29 to 0.92 s), and higher persistence lengths (nauplii: 1.52 to 11.12 mm; cyprids: 0.96 to 2.80 mm). Significant correlations between temperature and persistence length resulted from the effect of temperature on swimming speed for stage 6 nauplii and persistence time for cyprids. Analyses indicated directional bias of each swimming metric in the vertical dimension. Although the correlated random walk model is an idealized model of animal movement, we suggest that the quantification of directional persistence of larval marine benthic invertebrates can provide new insight into the evolutionary trade-offs associated with feeding and non-feeding life history strategies. KEY WORDS: Swimming speed · Random walk · Motility · Larval barnacle · Cypris · Nauplius · Meroplankton Full text in pdf format Supplementary material PreviousNextCite this article as: Sorochan KA, Metaxas A (2017) The effect of temperature on motility of the nauplius and cypris stages of the acorn barnacle Semibalanus balanoides. Mar Ecol Prog Ser 579:55-66. https://doi.org/10.3354/meps12246 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 579. Online publication date: September 14, 2017 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2017 Inter-Research.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".